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Constrains | Advanced
Django ORM Ninja: Técnicas Avanzadas para Desarrolladores
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Django ORM Ninja: Técnicas Avanzadas para Desarrolladores

Django ORM Ninja: Técnicas Avanzadas para Desarrolladores

1. Introduction to Django ORM
2. Models, datatypes, and fields
3. Queries
4. Relations
5. Complex Queries
6. Advanced

Constrains

This is an additional option within the Meta class, utilized for establishing certain constraints on the model. Implementing the unique=True option on a field effectively acts as a constraint.

UniqueConstraint

Ensures that the combination of specified field values is unique across the database table.

In this example, the UniqueConstraint ensures that no two books in the same genre have the same title.

CheckConstraint

Ensures that certain conditions hold true for the data in the database.

Suppose you want to ensure that the author's age is always greater than 18.

1. What is the purpose of the unique attribute in a Django model field?
2. What is the primary use of UniqueConstraint in Django's Meta class?
3. What does CheckConstraint do in Django models?

What is the purpose of the unique attribute in a Django model field?

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What is the primary use of UniqueConstraint in Django's Meta class?

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What does CheckConstraint do in Django models?

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¿Todo estuvo claro?

Sección 6. Capítulo 2
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